Question

Exercise 10
1 Subtract the following-
a). -7-5
b). 18-(-21)
c). (-27)-(-33)
d). -89-(+11)
e). 3/7-2)7
f). 9/20-3/20​

Answer 1

Answer:

1) -7-5

= -7+5

=-12

2)18-(-21)

=18+-21

=39

3)(-27) - (-33)

=60

4)-89-(+11)

=78

5)3x1, 2x1

7x1. 7x1

=3/7-2/7

=1/7

6)9/20-3/20

= 9x1 , 3x1

20x1 20x1

= 9/20-3/20

= 6/20

= 3/10

Answer 2

Answer:

Step-by-step explanation: